<template>
	<div class="list" ref='wrapper'>
		<div>
			<div class="area">
				<div class="title border-topbottom">当前城市</div>
				<div class="button-list">
					<div class="button-wrapper" >
						<div class="button">{{this.city}}</div>
					</div>
				</div>
			</div>
			<div class="area">
				<div class="title border-topbottom">热门城市</div>
				<div class="button-list">
					<div class="button-wrapper" v-for="item of hot" :key="item.id" @click="handleCityClick(item.name)">
						<div class="button">{{item.name}}</div>
					</div>
				</div>
			</div>
			<div class="area" v-for="(item,key) of cities" :key="key" 
			:ref="key"
			>
				<div class="title border-topbottom">{{key}}</div>
				<div class="item-list">
					<div class="item border-bottom" v-for="innerItem of item" :key="innerItem.id" @click="handleCityClick(innerItem.name)">{{innerItem.name}}</div>
				</div>
			</div>
		</div>
	</div>
</template>
<script>
import Bscroll from 'better-scroll'
import {mapState,mapMutations} from 'vuex'
export default {
	name: 'CityList',
	// 5.通过props接收数据
	props:{
		hot:Array,
		cities:Object,
		letter:String
	},
	computed:{
		  ...mapState(['city'])
	},
	methods :{
		handleCityClick (city) {
			// this.$store.commit('changeCity',city)
			this.changeCity(city)
			//页面跳转
			this.$router.push('/')
		},
		...mapMutations(['changeCity'])
	},
	mounted () {
		//在移动端点跳转不起作用后在后面加上click：true就行
		this.scroll=new Bscroll(this.$refs.wrapper,{tap: true,click:true})
	},
	watch: {
		letter () {
			if(this.letter){
				// 获得对应的dom节点的元素
				const element=this.$refs[this.letter][0]
				//点击对应的字母会跳转到对应的内容
				this.scroll.scrollToElement(element)
				
			}
			
		}
	}
		
}
</script>
<style lang='stylus' scoped>
@import '~styles/varibles.styl'
	.border-topbottom
		&:before
			border-color: #ccc
		&:after
			border-color: #ccc
	.border-bottom
		&:before
			border-color: #ccc
	.list
		overflow: hidden
		position: absolute
		top:1.48rem
		left:0
		right:0
		bottom:0
		.title
			line-height: .54rem
			background: #eee
			padding-left: .2rem
			color: #666
			font-size: .26rem
		.button-list
			overflow: hidden
			padding: .1rem .6rem .1rem .1rem
			.button-wrapper
				width:33.33%
				float: left
				.button
					margin: .1rem
					padding: .1rem 0
					text-align: center
					border: .02rem solid #ccc
					border-radius:.06rem
		.item-list
			.item
				line-height:.76rem
				padding: .2rem
				border-bottom: .02rem solid #ccc
					
</style>